Description:

Subfs is the kernel portion of the submount removable media handling system.
For submount to function, it needs both the subfs kernel module and the
submount package to be installed.

Submount is a system for automatically mounting and unmounting
removable media drives like CD-ROMs and floppy disk drives. Once
installed, it allows removable media drives to be accessed as if they
were permanently mounted.

Example line for a CD-ROM drive in /etc/fstab:
/dev/cdrom /mnt/cdrom subfs fs=cdfss,ro 0 0

Example line for a floppy drive in /etc/fstab:
/dev/floppy /mnt/floppy subfs fs=floppyfss,sync 0 0

Example line for a NFS in /etc/fstab:
host:/share_name /mnt/share_name subfs fs=nfs,program=/sbin/net-submountd 0 0